Simple WaitForSingleObject question
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Hi I created an event With the Following parameters CreateEvent(NULL,FLASE,FALSE,NULL); From what I understand the third parameter says what the initial state of the object is Signaled or NON signaled if it is FALSE non signaled the first time I executed the WaitForSingleObject my thread will return and in addition set the object to signaled Meaning all threads will have to wait till I call SetEvent Thing is the first time around the executing thread never returns
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Hi I created an event With the Following parameters CreateEvent(NULL,FLASE,FALSE,NULL); From what I understand the third parameter says what the initial state of the object is Signaled or NON signaled if it is FALSE non signaled the first time I executed the WaitForSingleObject my thread will return and in addition set the object to signaled Meaning all threads will have to wait till I call SetEvent Thing is the first time around the executing thread never returns
I think you've got the meaning of "signalled" the wrong way around. The wait function will return only when the event is signalled. An auto-reset event will automatically reset the event to non-signalled when it returns, and manual reset event will not. Use the
SetEventto release other threads, or theResetEventto block other threads. Think of the event of some operation that has to happen in your code. Other threads need to wait for that operation to complete. Once it has been completed, you signal the other threads that it is ok to proceed.Cheers, Mick ------------------------------------------------ It doesn't matter how often or hard you fall on your arse, eventually you'll roll over and land on your feet.
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I think you've got the meaning of "signalled" the wrong way around. The wait function will return only when the event is signalled. An auto-reset event will automatically reset the event to non-signalled when it returns, and manual reset event will not. Use the
SetEventto release other threads, or theResetEventto block other threads. Think of the event of some operation that has to happen in your code. Other threads need to wait for that operation to complete. Once it has been completed, you signal the other threads that it is ok to proceed.Cheers, Mick ------------------------------------------------ It doesn't matter how often or hard you fall on your arse, eventually you'll roll over and land on your feet.
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Okay how about the second parameter to CreateEvent if that is FALSE does that mean that after a signal'ed event returns right away from WaitForSingleObject Windows will Automatically turn the event to NON signalled
Yes, it does. bManual = FALSE means that it is an Automatic ResetEvent after a wait operation.
Cheers, Mick ------------------------------------------------ It doesn't matter how often or hard you fall on your arse, eventually you'll roll over and land on your feet.